Rotorua police Inspector Ed Van den Broek said it was important for people who were drinking alcohol to do so in moderation.
"Don't drink to excess, keep yourself safe, stick with friends and enjoy the entertainment," he said. Not drinking and driving was another key message Mr Van den Broek wanted to highlight.
"It's important people don't drink and drive, because they put themselves and other people at risk."
He urged people who were consuming alcohol to take the shuttle and taxi services available at the venue.
Police will also be patrolling the streets around Rotorua and the Bay of Plenty this weekend on the lookout for drink drivers and speeders, with several checkpoints in place.
Raggamuffin concert-goers will not be permitted to enter the stadium if they are carrying cans, glass bottles, video cameras, alcohol, illegal drugs or offensive weapons.
No food can be taken into the stadium today, only sealed bottles of water. However, small quantities of unopened/sealed drinks and non-commercial food such as sandwiches and fruit will be allowed in tomorrow.